Sorry I'm too lazy to make descriptions for these. :P By the way, these will be a mix of last/first evolutions. I may prefer one of the earlier evolutions over the final one. I may also select two from the same, "evolutionary family" for my favorites.

These are NOT in order, it's just simply my 10 favorites from each Pokemon Generation.

Generation 1:
Venusaur
Pidgeot
Clefable
Golbat
Wigglytuff
Vileplume
Poliwag
Chansey
Mr. Mime
Slobro


Generation 2:
Furret
Crobat
Togepi
Marill
Azumarill
Espeon
Wobuffet
Gligar
Elekid
Blissey


Generation 3:
Torchic
Sceptile
Dustox
Kirlia
Gardevoir
Swellow
Azurill
Banette
Metagross
Jirachi


Generation 4:
Prinplup
Piplup
Empoleon
Roserade
Togekiss
Mismagius
Mime Jr.
Spiritomb
Glaceon
Gallade


Generation 5:

Victini
Serperior
Dewott
Simipour
Audino
Leavanny
Darmanitan
Gothitelle
Reuniclus
Frillish


Generation 6:
Braixen
Florges
Meowstic
Doublade
Malamar
Heliolisk
Sylveon
Goodra
Goirgeist
Chespin